Add rabbitmq_credentials default for tests #448

Job	Run time
Static Analysis	11s
Build package	3s
Build package	12s
Call ci unit tests workflow / Run tests (3.9)	1m 46s
Call ci unit tests workflow / Run tests (3.10)	1m 40s
Call ci unit tests workflow / Run tests (3.11)	1m 50s
	5m 42s

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